Lubricator.



J. A. FRBTWBLL.

-v LUBRIGATOR. APPLICATION FILED sEPT.28.1908.

Patented?. July 2'?, 1909.

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J. FRBTWELL' LUBRICATR.

APPLICATION FILED SEPT. 28,1998, 2995626? Fammi Jy 27, wom

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will M @Hof/mega' JOHN A. FBiETWELL,v OF LITTLE ROCK, ARKANSAS.

' LUBRICATOR.

Specification of Letters Patent.

Patented July 27, 1909.

Application led September 28, 1908. Serial No. 454,954.

To all whom it may concern:

Be it known that I, JoiiN A. FRETWELL, a citizen of the United States, residing at Little Rock, in the county of Pulaski and State of Arkansas, have invented certain new and useful improvements in Lubricators; and I' do hereby declare the following to be a full clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. 1

My invention relates to improvements in lubrieators, and is especially designed to feed a measured charge. of powdered lubri- "cant at regular intervals to the parts to be lubricated.

The object of my invention is to produce a simple and inexpensive device whereby a charge of powdered lubricantis fedeither by a blast or suction at intervals, although it. can be used with liquid lubricants.

`With this object in' view my invention consists in the construction and combinations of parts as hereinafter described and claimed.

ln the. accompanying drawings-Figure l is a vertical cross sect-ion of my invention in the position assumed when the charge of lubricant. is being delivered. Fig. 2 is a similar section, the air pipe being broken ott', of the saine in its non-operative position. Fig. 8 is a vertical section of a `modification operated by suction. Figa 4 is a cross section, on a larger scale, of the measuring valve shown in Fig. 3. p

a represents a cup or reservoir for containing the lubricant, which is preferably powdered. The top of this cup` is closed by a removable cover b adapted to be screwed into the cup.

c represents an extension attached to or made integral with the cup by means of which it may be secured to the engine or other device to be lubricated.

Entering the side of the cup .or reservoir a is an air pipe el provided with a three-way cock c inclosed in a valve casing having an To the arm g is pivotally connected the end of a link L which is operated by the engine at suitable intervals by any desired connection (not shown) to shift the parts from the positionishown in Fig. 1-, to that in which the opening z' in the valve will register with the opening f, and back again.

The pipe l enters the cylinder a and passes nearly to its centerd where it is bent, forming a downward extension j open at the bottom,

the edges of the pipe near the bottoni being slotted, as shown at 7c. A boss m is located at the angle of this pipe and this boss is per forated. Through the perforation passes a piston rod n provided with a piston o, which reciprocates in the part 7' of the air pipe, in which it closely fits. The upper part of the rod n is surrounded by a spiral spring y; ad

justable byy means of a nut g on the topl of the piston rod n.

The lower end of. the cup a is provided with an extension `r, cent-rally perforated, which delivers into an expanded chamber, the wall of which is represented by s and which is provided withl a series of pipes t leading to the arious parts to be lubricated.

W'ithin the extension 4' is mounted the measuring 'alvc adapted to slide up and down, from the position shown in F l to the posit-ion shown in Fig. Q and back again. This valve is provided at its lower end with a stop plate u to which the piston rod 'n is fastened,vwliich stop ,plate is beveled, as

shown at o, and lits against a valve seat in thelower part of the extension r. The nicasuring valve is tubular in shape, with slots cut in its sides, leaving upright connecting portions fw which are connected to the'plate u and tothe top m of the valve which is centrally perforated and slides upon the part j of the air pipe which acts as a guide therefor.

. The operation is as follows z-The parts being in the position shown in Fig. 2 and the three-way valve closed, the lubricant of its own weight falls and fills the measuring valve, the three-way valve heilig then shifted into the position shown in Fig. 1""af blast of air comes in through the air pipe andforees the piston o down to the position shown in immediately thereafter forces the charge of lubricant` .carried by said measuring valve into the distributing chamber, from whence 1t passes through the pipes t to the parts to be lubricated.

In Figs. 3 and 4 is shown a modified form especially designed to be applied to the relief valves ofvlocomotives. In this modification, in which the measuring valve is operated by suction, 1 indicates apipe connected with the relief valve; 2 indicates a cylinder screwed into the upturned end of said pipe and provided with vent holes 3. The cylinder is provided with a downwardly extending perforated portion I which acts as al guide for the stein 5 which carries the measuring valve, and is also provided with a stop` valve 6` having a beveled edge T adapted to strike against a valveseat on the lower open end of the cylinder '2 at certain times. The nppei'a partof the cylinder 2 provided with aperforated extension 8 screw-threaded on the out-side for the reception of an extension 9 on the cup 10 which contains the lubricant. i The cup or reservoir l 10 is adapted to'be closed by a screw-threaded cap 11, and the extension 9 is perforated as shown at 12. In this perforated extension works the measuring valve 13'ofsubstan- .tially the forni already described.l `vWithin rthe cup or reservoir 10 is an air pipe having a horizontal port-ion 14 and a vertical portion 15 Which serves as a guide for the measuring valve, and within the portion 15 of. lie air pipe is mounted a piston rod'lt carrying a piston 17 adjustably controlled by the spring 1Sas already described.` The iower end of the vert'ical portion 15- of the air pipe is provided with slots 1f);4 The operation of this modification is substantially*the saine as already described, except thatit is operated by suction, a vacuum being produced at intervals in the pipe 1. vhf-n the vacuum is broken the spring 15 moves the measuring -valve and the parts attached thereto upward until the inclined faces on the measur- `Aing valve and stop valve contact with their respective seats. In this reverse motion, to

prevent con'ipression occurring in the cyliiider 2, I have provided said cylinder with the slots 3 through which the air in said cylinder may escape.

lVhile I have thus described my invention, I wish it to be distinctly understood that I do not limit in vself to the exact details shown and described, as these may be varied in many respects without departing from the spirit of my invention.

I claim 1. In a lubricator, the combination of a reservoir for containing a lubricant and provided with a perforated extension. an air pipe passing through one Wall of said reservoir and down.' into said perforated extension. a measuring valve adapted to slide on said air pipe, a piston rod carrying a piston mounted so as to slide in a part of said air pipe, and a spring for returning said piston rod to its original position when the air pressure is released, substantially as described.

Q. In a lubricator, the combination of a reservoir adapted to contain a. lubricant arnd provided with a perforated extension, an air pipe entering said reservoir and'bcnt downwardly into said extension, a piston rod provided with a iiston adapted to slide in the vertical-portion of said airpipe, a measuring valve attaciied to said piston rod, a spring normally holding said measuring valve in its highest position, and a valve for admittiiig air under pressure into said pipe, substantially as described.

3. In a .-lubrieator, the combination.of a lubricant reservoir provided with a perfo rated extension having a valve seat thereon an air pipe entering through the wall of said reservoir and being bent forming a -vertical portion leading down into said extension, a measuring valve adapted to slide upon the vertical portion of said pipe and provided with a portion adapted to fit against said valve seat, a piston rod connected to said measuring yvalve passing through the vertical portion of said pipe, a piston on said piston rod and adapted to slide within the vertical portion of said pipe, a spring for normally lifting said piston and said measuring valve, a three-wayY valve for admitting air atintervals into the air pipe in said reservoir, and devices for operating said three-way valve at intervals, substantially as described.

l. In a lubricator, the combination of a lubricant reservoir having a screw cap and an extension by means of which' said reservoirinay be, attached to the machine to be lubricated, 'said reservoir being provided with a perforated extension terminating in a distributing chamber and having a valve seat thereon, distributing pipes connected with said receiving chamber, an air pipe entering tlie wall of said reservoir and bent downwardly forming a vertical portion, said vertical portion being slotted at- `its lower end, a measuring valve adapted to slide on the vertical portion of said air pipe and provided with a part adapted to nt against the valve seat in said extension, said measuring valve consisting of a tube cut away at the sides and having a stop plate at the bottom and a perforated top fitting around the vertical portion of said air pipe, a piston vrod I ont hlough a perforation in Said air In testimony Wl1ereof,1afx mysignnture, pipe, a sp1-mg for normally hftmg sind m presence of two Wltnessr measurmg valve encuclmg sald plston rod,

v T- f vr means for adjustmg sind sprmg, a three-Way JGHB A' FRET ELL' mha located in said air ipe outside of said Ufitnesses:

xwzeevor, and devices or operatq'unzgv said S. L. MAYNARD,

who? substantially as descrilbee. Mrs. A. AFRENVELL. 

